Automatic seal for cream tubes



- June 13, 1933. A. RACK l 913 AUTOMATIC SEAL FOR CREAM TUBES Filed OCT.. 25, 193].

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Patented .lune 13, '1933 ABRAHAIBACK, or Los ANGELES, cmroam avremmo SEAL Fon camu TUBES applicati@ mea october 2s, 1931: serial mi. 576,646.

. to facilitate a dlscharge in such a manner.

-` sectional view o Fig. 1 turned around about One of the objects of this invention is to eliminate the customary screw cap byprovidin i an automatic gate that will open instant y when the tube is being squeezed for discharging a portion of the contents and `will just as readily shut off the discharge upon releasing the tube.

Another object is to provide a springcontrolled cylindrical gate in operative rela-` tion to the discharging end of a tube.

Other lobjects wlll appear from the following'description and appended claim' as well as from the accompanying drawing, in which Fig. 1 is a fra entary longitudinal midsectional view o the .discharging end ofa tube to which a spring-controlled automati# cally operating gate is applied according to this invention.v

i Fig. 2-is a fragmentary longitudinal midninety degrees, showin the cut-out for discharging matter throng the side of the tube-end when properly handled with a closing device of the typ? illustrated in Fig. 1.

ig. 3 is a fragmentary midsectional view of a tube-end with a slightly modified form of .cnt out and termination.

Fig'. 4 is a fra entary midsectional view of a slightly moiriied form of closure.

Fig. 5' is a fra entar midsectional view of another slight y modi ed form of closure.

In the form illustrated in Figs. 1 and 2, the tube-dischargeeend 6 is provided with l a cut-out 7 and an edge beveled and thinned downto a suitabledegree that it may easily be rolled over when crushed endwise.

Tubes of this sort are customarily made of rather soft material andit will'be under stood that such an edge can be forced in such a manner that it will firmly engage with a cap of the type indicated at 9 when more easily it will slide `wit the tube-end illustrated in this cap is forced uponithe end of the tube.

A plun er 10 is inserted in the o ening of the tu -end 6, forced inwardly y the spring l1, interposed between the bottom 12 formed in the plunger and the to 13 of the 55 cap. The innermost portion of t e plunger is rovided with'an aperture 14.

he plunger and spring arev inserted before the cap is sealed on the tube-end 6, being thereby permanently held in the tube. 00

If a portion of the contents is to be discharged from the tube, any squeezing of the tube naturall `forces the contents in the direction of t e arrows 15 against 'the plunger 10 and against the tension of the 05 spring 11 until the aperture 14 reaches a position above the edge 16 of the cut-out 7,

when the contents will discharge as long as the tube is beingl squeezed.

The spring 11', owever, is made strong VI0` enough that the plunger is immediately forced inwardly again as soon as the tube lis released, whereby the tube is sealed as before the squeezin 'Of course, the onger the lunger, the 'l5 lliin the discharging end of the tubewithout any tendenc of wedging or tilting, but it must be un erstood that the plunger may terminateA at tle upper edge of 'the aperture, indicated 80 at 1 Il? the plunger is'cut oli' at the edge 17, no particular guide is necessary since any part of the terminating edge 17 of the whole periphery of the plunger can properly co- 8c o erate with the edge 16 of the cut-out 7. owever, whenl the plunger is made longer and provide with the a erture as illustrated, a key 18 is preferab y provided on the plunger as illustrated, to slide within the 9o eut-out 7, thereby keeping' the aperture properly. aligned with the cut-out.

. In the slightly modified form illustrated in Figs. 3 and 4, the tube-end 6l is provided with a notch 19, by which the cap 9.. 1s se- 95 cured to the tube by means of a slight mdentation in the cap as indicated at 20. The front termination of the tube-end f0.1` this reason does not have to be beveled as 1n the form illustrated in Figs. 1 and 2. 100

Whether the cut-out in the tube-end is made wider as inthe form of Figs. 1 and 2, whereby a comparatively short movement f the plunger will suice to discharge a suit- '5 ably large amount of the contents, or the cut-out 7llis made narrower as in the form of Figs. 3 and 4, to require a much longer movement of the plunger before a similar amount of the contents can be discharged is, 10 of course, merely 'a matter of choice, or perhaps sales talk as to the quick discharge to the fullest extent in the one form and the gradual eventually under better control dis- I charge in the other form, the key 181 .being l the guiding means for non-rotative shiftings of the plunger a, and the spring 11a being inserted between the cap 9a and the plunger.

Another slightly modified form is illus- 20 trated in Fig. 5, in which the cap 9b itself is movable under control of the spring 11b, in this form on the outside of the tube. The spring is merely applied over the outside of the cap and of the tube-end 6b, eliminating the plunger and eventually the guide-key. Having thus described my invention, I claim In a tube seal, in combination with the tubular discharging end'of a tube, the said discharging end being provided with an open slot from vthe end inwardly, a cap disposed over the end, a closing member shiftable within said end and having means guided in said slot to shiftably retain the member in non-rotative alignment and havin an aperture at a point below and adapted to come aligned with the slot to allow matter to pass from thetube when the tube is being squeezed, and a spring 'inserted be- 40 tween the cap and the closing member for l www y controlling the shifting of the closing member against the discharge of such matter, the said end and thev said cap being provided with cooperative means designed to become .permanently interengaged when the i ca is pressed upon and against the said In testimony that I claim the foregoing as my invention I have si ed my name.

ABR HAM RACK. 

